The intermediate compound ‘X’ in the following chemical reaction is :

The correct answer is:

Explanation:

The given reaction represents the Etard reaction, which involves the partial oxidation of toluene (methylbenzene) to benzaldehyde using chromyl chloride (${\text{CrO}}_2{\text{Cl}}_2$) in a non-polar solvent such as carbon disulfide (${\text{CS}}_2$) or carbon tetrachloride (${\text{CCl}}_4$).

Reaction Mechanism & Steps:

1. Formation of Chromium Complex (Intermediate 'X'):
When toluene reacts with chromyl chloride (${\text{CrO}}_2{\text{Cl}}_2$) in carbon disulfide (${\text{CS}}_2$), chromyl chloride oxidizes the methyl group to form a brown-colored chromium complex intermediate 'X'.

The structure of this intermediate chromium complex is represented as:

${\text{C}}_6{\text{H}}_5\text{CH}{(\text{OCrOHCl}{}_2)}_2$

which corresponds to:

2. Acid Hydrolysis:
Subsequent acidic hydrolysis (${\text{H}}_3{\text{O}}^{+}$) of this intermediate complex yields benzaldehyde (${\text{C}}_6{\text{H}}_5\text{CHO}$).

Therefore, the intermediate compound 'X' is .